As per our Iowa Green Streets requirements, we will have to capture, retain, infiltrate and/or harvest the first 1.25 inches of rain that falls in a 24-hour period. This is mandatory for new construction project applications submitted after January 1st, 2010. As such our site team has been searching for examples of attractive rain water retention gardens and here's what we've found. Feel free to comment on which one you like best!
Also, check out this link to learn more about rain gardens!